JPH0669589B2 - Press machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press device for pressing a sheet metal, and more particularly to a positioning means for positioning a sheet metal (workpiece) to be processed at a predetermined position on a bending die. It has characteristics.

2. Description of the Related Art In order to improve the processing accuracy by press working, it is necessary to pick up a positioning hole formed in a workpiece with a pin prior to press working.

In the conventional press machine, when performing bending work, the third
As shown in the figure, a bending die 5 is installed as a lower die on the die holder 7, a pad 3 is provided therein, and a cushion pin 6 is used to push it up from below by a spring. The workpiece 2 is placed on the bending die 5 and the pad 3, and the bending punch 1 presses the workpiece 2 from above to perform bending. At this time, in order to improve the accuracy, the workpiece 2 is provided with a positioning hole 8 and the positioning pin 4 previously installed in the bending die 5 is inserted into the hole 8 for positioning. At this time, since the positioning pin 4 protrudes upward from the bending die 5, the positioning pin 4 is manually inserted into the positioning hole 8 of the workpiece 2, and after pressing, the positioning pin 8 is positioned through the positioning hole 8. I had removed pin 4.

Problems to be Solved by the Invention However, in the above-mentioned configuration, it is necessary to manually place the work piece on the pad so as to fit it on the positioning pin, or to remove it, which is very troublesome. . Therefore, it can be done only with a single die.

In view of the above problems, the present invention provides a press device that improves work efficiency.

Means for Solving the Problems In the pressing device of the present invention, when a bending die supported by an elastic body so as to be movable up and down is supported at an upper position by the elastic body, the positioning pin is an upper surface of the bending die. When the bending die is pressed down by the pressing pin that moves downward together with the bending punch in association with the downward movement of the bending punch, and the bending die is pushed downward against the elastic body, the positioning pin moves to the bending die. Of the work piece placed on the bending die so as to be engaged with the positioning hole of the work piece placed on the bending die.

The present invention has the above-described configuration, and when the workpiece is conveyed from the side to the upper surface of the bending die, the positioning pin is lowered from the upper surface of the bending die, so that the pin does not get in the way and the conveying means such as a pusher. It can be automatically transported and can be positioned on the upper surface of the bending die. Also, after processing
It is possible to automatically remove the work piece from the die by blowing it off with air, etc., without having to remove the work piece from the die by hand one by one. Therefore, it is possible to efficiently place or remove the work piece on the bending die.

Embodiment A press device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front cross-sectional view of this embodiment, and the same reference numerals are given to the components having similar functions to those of the conventional example shown in FIG. The feature is that the bending die 5 is provided on the die holder 10 so as to be vertically movable via the spring 9. The positioning pin 4 having one end fixed to the die holder 10 is inserted into a through hole formed in the bending die 5 by extending in the vertical direction, and the bending die 5 and the pad 3 are moved by the elastic biasing force of the spring 9. When it ’s going up,
It is configured so that it does not protrude from the top surface. On the other hand, a push pin 14 for pushing the bending die 5 downward is provided on the bending punch 1 side, and is pushed downward by a spring. The tip of the pressing pin 14 is set closer to the bending die 5 than the tip of the bending punch 1.

As shown in the side sectional view of FIG. 2, a stocker 12 is provided in front of the bending die 5 to stock the workpieces 2, and a pusher 13 is provided on the lowermost lateral surface thereof. The pusher 13 pushes the workpieces one by one onto the bending die 5. A stop pin 1 for stopping the extruded work piece is attached to the pad 3.

The operation of the press device configured as described above will be described.

Workpiece 2 from the bottom of stocker 12 by busher 13
Is extruded from the side of the stocker 12 above the single bending die 5 and conveyed. At that time, hit the stop pin 11 to set the lateral position. Next, when the upper bending punch 1 is lowered, first the pressing pin 14 pushes down the bending die 5 against the spring 9. Then, the positioning pin 4 projects to the upper surface of the bending die 5 and enters the positioning hole 8 of the workpiece 2. This enables accurate positioning. When the bending punch 1 is moved downward in this state, the pad 3 is pressed to perform bending, and the extra stroke of the pressing pin 14 is escaped by the spring. Bending punch 1 after processing is completed
When the tool is moved up, the bending punch 1 first comes off and the pressing pin
Since 14 also moves upward, the bending die 5 also moves upward, and the positioning pin 4 moves below the upper surface of the bending die 5 to be removed from the positioning hole 8 of the workpiece 2. Therefore, the workpiece 2 can be blown off by air or easily removed from the mold by other methods.

EFFECTS OF THE INVENTION According to the present invention, it is possible to automatically attach and detach the work piece to and from the die, which is conventionally required to manually attach and detach the work piece to the die. The efficiency can be improved. Moreover, since the relative movement of the positioning pin with respect to the workpiece is configured to be performed by the pressing pin that moves up and down integrally with the bending punch, no other power source is required, and the configuration is simple. It will be.

[Brief description of drawings]

FIG. 1 is a front sectional view of a pressing apparatus according to an embodiment of the present invention, FIG. 2 is a side sectional view thereof, and FIG. 3 is a front sectional view of a conventional example. 1 ... Bending punch, 2 ... Workpiece, 3 ... Pad, 4 ...
… Positioning pin, 5 …… Bending die, 6 …… Cushion pin, 10 …… Die holder, 8 …… Positioning hole, 9 ……
Spring, 11 …… Stoppin, 12 …… Stocker,
13 …… pusher, 14 …… pin.

Claims (1)

[Claims] 1. A bending die and a pad, which are supported by a die holder by an elastic body so as to be independently movable up and down,
A positioning pin inserted into a through hole formed at one end of the die holder and extending vertically in the bending die, and a work piece from the side along the pad and the upper surface of the bending die. Transporting means for feeding to a predetermined position, a bending punch capable of moving up and down with respect to the upper surfaces of the bending die and the pad, a tip of which is closer to the bending die than a tip of the bending punch, and is vertically moved together with the bending punch. When the bending die and the pad are supported at an upper position by the urging force of the elastic body, the positioning pin is positioned above the upper surface of the bending die so as not to hinder the transfer of the workpiece. It is immersive, and the pressing pin presses the bending die as the bending punch descends during the pressing operation, and the bending die presses the elastic body. When pushed downward against the body, the positioning pin projects from the upper surface of the bending die and inserts into and engages with a positioning hole formed in the workpiece mounted on the bending die, A press device that regulates the relative positions of objects and bending dies.